Documents Distribution Strategy Based on Queuing Model and Chaotic Searching Algorithm in Web Server Cluster

For a large website adopting Web server cluster, how to organize and distribute web documents is a challenging problem. In this paper, we propose a strategy to distribute web documents in web server cluster, whose aim is to reduce system ´s average response time. The strategy uses queuing model to analyze cluster system, and translates the document distribution problem into a 0-1 integer programming problem. Aimed at such kind of 0-1 integer programming problem, we propose a chaotic searching algorithm to solve it. The chaotic searching algorithm lets many isolated chaotic variables search in their tracks, so the corresponding 0-1 distribution matrix built by these variables can experience every possible distribution, thereby it can find the global optimal solution in enough long time. Simulation tests show that the chaotic searching algorithm can find the global optimal solution.